Hospitals use many modern materials, from advanced plastics to composite panels, yet the pipes that carry oxygen and other medical gases are still almost always made of copper. That is not tradition for its own sake. Copper has a combination of properties that no other common pipe material matches for this job. Here is why designers and hospital engineers keep specifying it.
1. It is compatible with oxygen
Oxygen-enriched gas makes many materials burn more easily. Some plastics and elastomers that are perfectly safe in water pipes can ignite or degrade in a high-oxygen environment, especially under pressure. Copper is non-combustible under normal pipeline conditions and does not react with medical oxygen, nitrous oxide, carbon dioxide or medical air. That makes it inherently safer for a system where oxygen is the most important gas.
2. It can be made and kept very clean
Medical gas must reach the patient free from oil, particles and other contaminants. Copper tube can be cleaned and degreased to very low residue levels at the mill, then capped at both ends so that it stays clean until installation. Standards such as EN 13348 and ASTM B819 set specific cleanliness limits for medical grade copper tube, and these are achievable and verifiable with copper in a way that is harder with many alternatives.
3. Its joints are strong and permanent
In an MGPS, copper tubes and copper fittings are joined by brazing, using a filler metal that melts at a high temperature and flows into the joint. A properly brazed joint is often as strong as the tube itself, does not rely on seals or O-rings that can age, and is fully metallic from end to end. Brazing is carried out with a nitrogen purge inside the pipe to prevent oxide scale forming on the inner surface.
4. It resists corrosion
Copper naturally forms a thin protective surface layer that slows further corrosion. Inside a dry medical gas system, copper pipework can last for decades. That matters because replacing pipework inside walls and ceilings of a working hospital is disruptive and expensive.
5. It has natural hygienic properties
Copper surfaces are known to reduce the survival of many bacteria and viruses over time. While the inside of a sealed gas pipeline is not a touch surface, this property is one reason copper is widely trusted in healthcare settings generally.
6. It is easy to install and modify
Copper tube is light compared with steel, easy to cut and bend, and available in a wide range of standard sizes with matching fittings. Contractors can route it neatly through ceiling voids and risers, and extensions can be added later when wards are refurbished. Standard elbows, tees, couplings and reducers make it straightforward to build complex networks.
7. It is fully recyclable
At the end of a building’s life, copper pipework can be recycled without losing its properties. That gives it a strong sustainability profile and a residual scrap value that plastics do not have.
What to look for when buying
Not all copper tube is suitable for medical gas. When sourcing, check these points:
- The tube is certified to a medical gas standard such as EN 13348 or ASTM B819, not a general plumbing standard.
- Each batch comes with a material test certificate.
- Tubes are delivered cleaned, degreased and capped at both ends.
- Fittings are made from the same quality of copper and are also cleaned for oxygen service.
- Markings on the tube identify it as medical grade.
Sourcing copper for your MGPS
Nefton Exports Industries manufactures medical grade copper tubes and copper fittings for medical gas pipeline systems, supplied with test certificates and export packaging. Send us your bill of quantities and we will quote for your project.
